SYDNEY: The mother of Australian-born WikiLeaks founder Julian Assange today expressed fear for her son's safety, saying the forces he was challenging had become "too big". Christine Assange said her "highly intelligent" and curious son had been raised as a strongly ethical "seeker of truth". But Assange said her son, now subject to a global Interpol arrest demand over rape charges in Sweden, had become "too smart for himself" and she now feared for his safety.